Why is using indexes in a database important for improving search and data retrieval performance?

Database indexes are special structures that speed up data search and retrieval. Without indexes, the DBMS must scan all records (full scan), which takes a lot of time with large volumes.

Advantages of indexes:

• Fast access to data by key or condition.
• Accelerates JOIN operations and sorting.

However, indexes occupy additional space and slow down insert and update operations, so it is important to create them only where truly necessary.

Example: if users are frequently searched by email, it is advisable to create an index on the email field to make queries faster.